题目内容

4.  (2015 山东泰安中考) 一Our classmates went to a concert yesterday afternoon.

   一What a pity!I my homework.

   A. had done   B. was doing

   C. am doing   D. would do

4. B根据语境可知同学们参加音乐会时我在做作业,用过去 进行时。故选B.
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